Kodak electron microscope electron microscope films are specifically designed to provide high image quality for electron diffraction studies and transmission electron micrography (TEM). Kodak EM film (Type 4489) offers unparalleled dimensional stability and exhibits a slow-medium very fine grain emulsion, which is suitable for routine applications. Kodak electron image film (Type SO-163) provides wide exposure and development ranges, encompassing a broad range of applications, from very short exposures to long exposures. The films are delivered in boxes of 100 sheets or multipacks of 250 sheets.